RS232C CONTROL
COMMANDS AVAILABLE FROM THE
MULTIPLEXER
ACK(0A)
Response when this unit receives a command.
NAK(0B)
Response if this unit did not receive the command.
ALARM(BF)
When there is an alarm, this command is sent as header. Then,
the alarm information is sent in a 1-byte transmission (see Table
3).
ALARM information (Table 3)
Bit
Bit state information
7
Alarm information
01: External
indication
6
10: Video loss
11: Sensor alarm
5
Reserved
0
4
Reserved
0
3
Camera number
0011: CAMERA NO. 4
indication
2
0010: CAMERA NO. 3
1
0001: CAMERA NO. 2
0
0000: CAMERA NO. 1
OTHER COMMANDS
ENTER(40)
When numeric commands are all sent, this command is used to
enter the transmitted value.
CLEAR(56)
To erase multiple byte commands.
English
37